Photo from the Ministry of Defense of Ukraine

Russian-led forces mounted 50 attacks on Ukrainian troops in Donbas in the past day, using heavy weapons 19 times.

"In the Luhansk sector, the intensity of shelling increased after dark near the villages of Krymske, Troyitske and Novozvanivka," the press center of Ukraine's Joint Forces Operation (JFO) said in an update on Facebook as of 07:00 on May 12, 2018.

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The situation in the Donetsk sector was more tense. Here, 24-hour battles continue near the town of Avdiyivka, and the villages of Verkhniotoretske, Kamianka, Opytne, Pisky and Zaitseve.

The Ukrainian military also held the line in the Mariupol sector, namely near the villages of Hnutove and Shyrokyne.

"According to reconnaissance reports, three Russian occupiers were killed and four others were wounded as a result of an adequate response. During the hostilities, three our defenders were wounded and evacuated to the hospital. No casualties are reported among the Ukrainian military since the beginning of the day," the report says.